Fill in the Blanks Plant classificationOnline version Filling the gaps exercise about plant classification by Martín Vicente 1 trunks cones damp flowers rhizoids simple large fruit large grouped seeds underground rocks corolla conditions small produce 1 . Angiosperms : they usually have beautiful . They can be , like roses , or small daises . They produce with inside . 2 . Gymnosperms : they have got , simple flowers without a or a calix . They do not fruits . The seeds are together in . 3 . Moses : they are very small , plants . They grow on , tree , and in the ground in places . The roots are called . 4 . Ferns : they need damp in order to survive . They have leaves . They have stems .